Glue-filled type PCB board distribution box

Abstract

The utility model relates to electrical equipment technical field discloses glue filling type with PCB board branch box, including upper cover, the lower surface of upper cover is pasted with lower casing, the inner wall of upper cover is provided with sealing assembly, sealing assembly includes sealing ring, sealing ring outer wall sliding connection is in the inner wall of upper cover, sealing ring lower surface fixedly connected with sliding rod, the outer wall sliding connection of sliding rod has fixed link, the outer wall of fixed link is equipped with spring, the inner wall fixed connection of upper cover has reinforcing column, in the utility model, through setting up sealing assembly by sealing ring, sliding rod, fixed link and spring in the upper cover, when the upper and lower casing is pressure -sintered, spring is pressed and generates the elastic force, pushes sealing ring and closely pastes casing joint surface, forms reliable dynamic sealing structure, can effectively prevent epoxy resin seepage in glue filling technology, ensures that the sealing performance is stable, avoids the influence product appearance and quality because of glue liquid overflow simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment technology, and in particular to a potting type junction box with PCB board. Background Technology

[0002] Encapsulated junction boxes with PCB boards are widely used protective devices for electronic equipment in power, communication, and industrial control fields. They are primarily used to fix and protect PCB boards, while encapsulating them with adhesives (such as epoxy resin fillers) to enhance waterproofing, dustproofing, and shock resistance. These junction boxes typically consist of a top cover and a bottom shell, requiring excellent sealing to prevent adhesive leakage during encapsulation. They also need to provide stable mechanical protection to withstand complex operating environments. Traditional junction boxes rely on a sealed shell, leaving the PCB board exposed to moisture and dust, leading to circuit corrosion and short circuits.

[0003] In existing technologies, potting-type junction boxes mostly use simple clips or bolts to fix the upper and lower housings, and set static sealing rings or gaskets on the mating surfaces to achieve a seal. Some solutions rely on interference fits or adhesives to assist in sealing, while the PCB board is usually fixed by screws or slot structures. These structures rely on manual alignment during assembly, and the sealing rings lack self-compensation ability after being compressed, which may lead to sealing failure after long-term use.

[0004] During the potting process, due to the static characteristics or insufficient elasticity of the sealing structure, the adhesive can easily seep out from the joints of the housing, causing product appearance contamination or even damage to internal electronic components, affecting the sealing reliability of the junction box and the quality of the finished product. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a potting type junction box with PCB board, which aims to improve the problem that during the potting process, due to the static characteristics or insufficient elasticity of the sealing structure, the glue easily seeps out from the shell seams, causing product appearance contamination or even damage to internal electronic components.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a potting type junction box with PCB board, including an upper cover, a lower shell attached to the lower surface of the upper cover, and a sealing component provided on the inner wall of the upper cover;

[0007] The sealing assembly includes a sealing ring, the outer wall of which is slidably connected to the inner wall of the upper cover. A sliding rod is fixedly connected to the lower surface of the sealing ring, and a fixed rod is slidably connected to the outer wall of the sliding rod. A spring is sleeved on the outer wall of the fixed rod.

[0008] Furthermore, a reinforcing column is fixedly connected to the inner wall of the upper cover, a locking block is fixedly connected to the outer wall of the upper cover, a locking groove is opened inside the lower housing, a recess is opened inside the lower housing, and a placement slot is opened inside the lower housing.

[0009] Furthermore, one end of the spring is fixedly connected to the inner wall of the upper cover, and the other end of the spring is fixedly connected to the lower surface of the sealing ring.

[0010] Furthermore, the outer wall of the reinforcing column is slidably connected inside the groove.

[0011] Furthermore, one end of the fixing rod is fixedly connected to the inner wall of the upper cover, and the spring is disposed inside the upper cover.

[0012] Furthermore, the outer wall of the card block is slidably connected to the inside of the card slot.

[0013] Furthermore, the sliding rod is disposed inside the upper cover.

[0014] Furthermore, the placement slot is used to place the PCB board.

[0015] This utility model has the following beneficial effects:

[0016] 1. In this utility model, by setting a sealing assembly consisting of a sealing ring, a sliding rod, a fixing rod and a spring inside the upper cover, when the upper and lower shells are pressed together, the spring is compressed and generates elastic force, which pushes the sealing ring to tightly fit the shell joint surface, forming a reliable dynamic sealing structure. This can effectively prevent epoxy resin leakage during the potting process, ensure stable sealing performance, and avoid affecting the product appearance and quality due to glue overflow.

[0017] 2. In this utility model, by strengthening the sliding fit between the column and the groove and the locking between the block and the slot, the structural stability of the upper and lower shells is enhanced, preventing external impact from causing the shells to misalign or loosen. The placement groove provides precise positioning and protection for the PCB board. Combined with the anti-leakage characteristics of the sealing component, the overall dustproof, moisture-proof and mechanical protection capabilities of the junction box are improved, and the service life of the internal electronic components is extended. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the potting-type junction box with PCB board proposed in this utility model;

[0019] Figure 2 This is a schematic diagram of the sealing ring structure of the potting type PCB board junction box proposed in this utility model;

[0020] Figure 3 for Figure 2 Enlarged view of point A in the image;

[0021] Figure 4 This is a schematic diagram of the lower housing structure of the potting-type PCB board junction box proposed in this utility model;

[0022] Figure 5This is a schematic diagram of the placement groove of the potting type PCB board junction box proposed in this utility model.

[0023] Legend:

[0024] 1. Top cover; 2. Slot; 3. Reinforcing post; 4. Lower shell; 5. Groove; 6. Locking block; 7. Placement slot; 8. Sealing ring; 9. Spring; 10. Sliding rod; 11. Fixing rod. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Reference Figures 1-5 The present invention provides an embodiment of a potting type junction box with PCB board, including an upper cover 1, a lower shell 4 attached to the lower surface of the upper cover 1, the upper cover 1 and the lower shell 4 forming the main structure of the junction box to achieve the encapsulation and protection of the PCB board, and a sealing component provided on the inner wall of the upper cover 1.

[0027] The sealing assembly includes a sealing ring 8, which forms a dynamic sealing surface during the pressing process to prevent adhesive leakage. The outer wall of the sealing ring 8 is slidably connected to the inner wall of the upper cover 1. A sliding rod 10 is fixedly connected to the lower surface of the sealing ring 8, guiding the sealing ring 8 to move linearly along a fixed rod 11. The outer wall of the sliding rod 10 is slidably connected to the fixed rod 11, which provides a stable movement track for the sliding rod 10. A spring 9 is sleeved on the outer wall of the fixed rod 11, providing continuous elastic force to keep the sealing ring 8 tightly fitted. A reinforcing post 3 is fixedly connected to the inner wall of the upper cover 1, and the reinforcing post 3 cooperates with the groove 5 to achieve the guiding positioning and structure of the upper and lower shells. For reinforcement, a locking block 6 is fixedly connected to the outer wall of the upper cover 1. The locking block 6 and the locking groove 2 are physically locked together by interference fit. The lower cover 4 has a locking groove 2, a groove 5, and a placement groove 7. One end of the spring 9 is fixedly connected to the inner wall of the upper cover 1, and the other end of the spring 9 is fixedly connected to the lower surface of the sealing ring 8. The outer wall of the reinforcing column 3 is slidably connected to the inside of the groove 5. One end of the fixing rod 11 is fixedly connected to the inner wall of the upper cover 1. The spring 9 is set inside the upper cover 1. The outer wall of the locking block 6 is slidably connected to the inside of the locking groove 2. The sliding rod 10 is set inside the upper cover 1. The placement groove 7 is used to place the PCB board.

[0028] Specifically, the PCB board is first accurately placed in the placement slot 7 of the lower housing 4. Then, the upper cover 1 is aligned and pressed with the lower housing 4. During the pressing process, the reinforcing post 3 of the upper cover 1 slides into the groove 5 of the lower housing 4 to achieve initial positioning and structural reinforcement. At the same time, the locking block 6 on the outer wall of the upper cover 1 and the locking groove 2 of the lower housing 4 are physically locked through interference fit. As the core sealing mechanism, when the upper cover 1 and the lower housing 4 are pressed together, the sealing ring 8 is squeezed and drives the sliding rod 10 to move along the fixed rod 11. At the same time, the spring 9 is compressed to generate a reverse elastic force, so that the sealing ring 8 always fits tightly against the housing joint surface to form a dynamic seal.

[0029] Working principle: First, the PCB board is placed in the placement slot 7 of the lower housing 4. Then, the upper cover 1 is aligned and pressed with the lower housing 4. During this process, the reinforcing post 3 of the upper cover 1 slides into the groove 5 of the lower housing 4 for guidance and reinforcement. At the same time, the locking block 6 on the outer wall and the locking groove 2 achieve physical locking through interference fit. Its core sealing function is completed by the sealing component in the upper cover 1. When the upper and lower housings are pressed together, the spring 9 is compressed and generates elastic force, which pushes the sealing ring 8 along the fixed fixing rod 11 through the sliding rod 10, so that it is pressed tightly on the housing joint surface to form a reliable seal. This can effectively prevent epoxy resin from seeping out from the gaps in the subsequent potting process, thereby ensuring the final quality and appearance of the product. The upper cover 1 and the lower housing 4 of the junction box are respectively equipped with four sets of reinforcing posts 3 and their corresponding grooves 5, which reduces the problem of gaps still remaining on the side walls when the product structure is inserted, and achieves a perfect sealing effect. At the same time, after the potting curing, a resistance structure is formed, which enables the product to cope with vibration and impact, greatly enhancing the service life of the PCB board.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A potting-type junction box with a PCB board, including a top cover (1), characterized in that: The lower surface of the upper cover (1) is fitted with the lower shell (4), and the inner wall of the upper cover (1) is provided with a sealing assembly; The sealing assembly includes a sealing ring (8), the outer wall of which is slidably connected to the inner wall of the upper cover (1), a sliding rod (10) is fixedly connected to the lower surface of the sealing ring (8), a fixed rod (11) is slidably connected to the outer wall of the sliding rod (10), and a spring (9) is sleeved on the outer wall of the fixed rod (11).

2. The potting type junction box with PCB board according to claim 1, characterized in that: The inner wall of the upper cover (1) is fixedly connected with a reinforcing column (3), the outer wall of the upper cover (1) is fixedly connected with a locking block (6), the lower shell (4) has a locking groove (2), the lower shell (4) has a groove (5), and the lower shell (4) has a placement groove (7).

3. The potting type junction box with PCB board according to claim 1, characterized in that: One end of the spring (9) is fixedly connected to the inner wall of the upper cover (1), and the other end of the spring (9) is fixedly connected to the lower surface of the sealing ring (8).

4. The potting type junction box with PCB board according to claim 2, characterized in that: The outer wall of the reinforcing column (3) is slidably connected to the inside of the groove (5).

5. The potting type junction box with PCB board according to claim 1, characterized in that: One end of the fixing rod (11) is fixedly connected to the inner wall of the upper cover (1), and the spring (9) is set inside the upper cover (1).

6. The potting type junction box with PCB board according to claim 2, characterized in that: The outer wall of the card block (6) is slidably connected to the inside of the card slot (2).

7. The potting type junction box with PCB board according to claim 2, characterized in that: The sliding rod (10) is located inside the upper cover (1).

8. The potting type junction box with PCB board according to claim 2, characterized in that: The placement slot (7) is used to place the PCB board.

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